Motion converting means



July 19, 1955 Q DODEGGE 2,713,271

MOTION CONVERTING MEANS Filed July 17 1951 FIE- E (I, f V j] 7 a; 5 W9996 555 64 25 z 55 F: 51,

'fi'hnm mm iii 7 PIE. 7 5;: i2 52 j 20 United States Patent Gfiice2,713,271 Patented July 19, 1955 MOTION CONVERTING MEANS Carl Dodegge,Maywood, Ill assignor b y mesne ass! ments, to Mall Tool Company, Chicago, 11]., a corp ration of Illinois Application July 17, 1951, SerialNo. 237,194 4 Claims. (Cl. 74-50) This invention relates to attachmentsfor power tools and more particularly to attachments for hand drills andthe like.

A primary object of my invention is to provide a novel attachment forhand drills and the like, which may be powered by a rotative source ofpower such as the drive shaft of a hand drill and is effective, in a andexpeditious manner, to drive hand tools operate with a reciprocatorymotion.

Another object of my invention is to provide a novel attachment of theaforementioned type which is well balanced, easy to handle, and whereinthe reciprocatmg hand tool member is driven substantially in alignmentwith the path of travel of the reciprocating drive member of theattachment.

A further object is to provide a novel attachment which may be readilyassembled and disassembled, is sturdy in construction but is light inweight, and which is pracheal and eflicient in operation and may bereadily manufactured commercially in an efiicient and economical manner.

Yet another object of my invention is to enable reciprocatory cuttermembers such as saws, files, knives, and the like, to be readily drivenin a novel and expeditious manner, as an attachment to hand drills andthe like, and, when so used, to afford novel, practical power drivendevices for performing cutting operations such as sawing, filing orslicing.

A further object of my invention is to afford a novel attachment of theaforementioned type which may be quickly and easily attached to a handdrill or the like, and wherein a cutter member such as a saw, file orthe like, may be quickly and easily inserted in, and removed fromoperative position in the attachment.

Another object is to provide a novel attachment of the aforementionedtype wherein the cutter member is supported at one end thereof, and isdriven, in a novel and expeditious manner.

Yet another object of my invention is to afford an attachment of theaforementioned type wherein the cutter member is supported by, andremovable with, a removable side wall of the attachment in a novel andexpeditious manner.

Other and further objects of the present invention will be apparent fromthe following description and claims and are illustrated in theaccompanying drawings which, by way of illustration, show a preferredembodiment of the present invention and the principles thereof and whatI now consider to be the best mode in which I have contemplated applyingthese principles. Other embodiments of the invention embodying the sameor equivalent principles may be used and structural changes may be madeas novel which desired by those skilled in the art without departingfrom the present invention and the purview of the appended claims.

In the drawings:

Fig. 1 is a perspective view of an attachment embodying the principlesof my invention, and showing the attachment operatively mounted on ahand drill;

Fig. 2 is a longitudinal sectional view of the attachment shown in Fig.1;

Fig. 3 is a sectional view taken substantially along the line 33 in Fig.2;

Fig. 4 is a detail front elevational view of a portion of the attachmentshown in Fig. 2;

. Fig. 5 is a detail side elevational view of the device shown in Fig.4;

Fig. 6 is a detail sectional view taken substantially along the line 66in Fig. 2; and

Fig. 7 is a detail sectional view taken substantially along the line 7-7in Fig. 2.

A cutter attachment for hand drills, and the like, is shown in theaccompanying drawings to illustrate a preferred embodiment of myinvention. The attachment 20 comprises, in general, a cutter mechanism Creciprocably mounted in a housing H and operatively connected to a drivemechanism M mounted in the housing H and projecting therefrom forconnection to a suitable power unit, such as a hand drill D.

The cutter mechanism C is shown in the accompanying drawings asembodying a saw blade 22. However, it will be understood that othersuitable types of cutter mechanism such as, for example, files andknives may be substituted therefor without departing from the purview ofmy invention.

The housing H comprises a top wall 24, two end walls and 26, two sidewalls 27 and 28 and a bottom wall 29. The top wall 24, end walls 25 and26, and side walls 27 and 28 are preferably formed as a single unit toafford a substantially inverted cup-shaped body member 31 for thehousing H. The body member 31 is preferably made of suitable materialsuch as cast aluminum.

A boss 33 projects inwardly from the inner face of the end wall 25 ofthe housing H and has a downwardly extending partition wall 34projecting from the inner end portion thereof. Two holes 36 and 37, Fig.7, are tapped in enlarged sections of one end portion of the side walls27 and 28, respectively, adjacent the end wall 26, which end of theattachment 20 will hereinafter be referred to as the front end, theother end, which includes the end wall 25, being referred to as the rearend. Two other holes 39 and 40 are tapped in the side walls 27 and 28toward the rear of the housing H adjacent the junction of the side walls27 and 28 with from the end Wall 25, Figs. 2 and 3.

The bottom wall 29 of the housing H has an elongated boss 42 projectingupwardly from the rear end portion of the upper face thereof in positionto abut the lower edge of the partition wall 34 when the bottom wall 29is disposed in normal closed position on the body member 31, Fig. 2. Thebottom wall 29 of the housing H is releasably attached to the bodymember 31 by four screws 43 which extend through the bottom wall 29 andare threadedly engaged in the openings 36, 37, 39 and 40.

A substantially cylindrical shaped boss or offset portion 44 is formedon the forward end portion of the bottom wall 29 and projects upwardlytherefrom and is disposed in a recess 45 formed in the front face of thefront wall 26 of the housing H. A substantially cylindrical shapedopening 47 is formed in and extends through the boss 44 in alignmentwith a downwardly opening arcuateshaped opening 49 formed in the frontwall 26 of the mounted in the housing H with the shank 53 disposed inalignment with the openings 47 and 49; The rear end portion of the shank53 is slidably mounted on the upper face of the abutment member 34 onthe bottom wall 29 of the housing H, and extends .rearwardly through a.slot 55 formed in the partition wall 34. Abushing 57, Fig. 2, ismounted in the opening 47 in the boss 44 on the bottom wall 29 and isheld in position therein by a set screw 59. A piston 61, which forms theconnecting member of my novel attachment 20" by means of which thecutter members, such as a saw blade 62, Figs. 1 and 2, may be removablyconnected to the slide 51 for reciprocation thereby, is reciprocablymounted in the bushing 57. The front end portion of the shank 53 of theslide 51 extends into, and is welded to, the piston 61, the piston 61being disposed in the bushing 57 in alignment with the shank 53 of theslide 51 whereby the slide 51, upon reciprocation longitudinally in thehousing H, is effective to move the piston 61 inwardly and outwardly inthe bushing 57.

A downwardly opening slot 63 is formed in the front ,end portion of thepiston 61 and extends rearwardly along the center line thereof.

The slot 63 is of proper size and shape to receive the butt or rear endportion of the saw blade 62, and the latter is mounted therein with thefront end portion of the blade 62 projecting forwardly from the piston61 and outwardly through the opening 47 in the bottom wall 29, and withthe upper edge of the rear end portion of the blade 62 clamped inabutting engagement with the closed-end wall 63a of the slot 63' by aset-screw 64 threaded into the lower portion of the piston 63 and andengaged with the lower edge of the blade 62. The set-screw 64 is of thestraightshanked type, as best seen in Fig. 2, and when disposed innormal clamping position relative to the blade 62 is embedded in thepiston 61 so that no portion thereof 7 projects from the piston 61.While I have shown a saw blade 62 mounted in the piston 61 to illustratethe principles of my invention, it will be understood by those skilledin the .art that this is by way of illustration only and that othersuitable cutter members such as files and knives may be substitutedtherefor without departing from the purview of my invention.

A guard member 81, Figs. 2, 4, and 5 having a substantially cup-shapedbody member 82 and a U-shaped abutment member. 83 welded thereto isremovably mounted. on the free end portion of the boss 44 on the bottomwall 29'of the housing H. The cup-shaped body.

portion 82 of the guard 81 is of such a size as ,to fit relativelysnugly on the boss 44, but is sufliciently loose thereon that it may bereadily mounted on and removed from the boss 44 by hand. A cylindricalShaped opening 85 is formedin the closed end portion of the body member82 of the guard 81 and the abutment member :83 has a slot 87 formed inone leg 83a thereof. The

free end portion of the other leg 83b of the abutment member 83 iswelded .to the outer peripheral surface of the body member 82 of theguard 81 in position whereby the leg 83a extends upwardly past theclosed end of the body member 82 with the slot 87 disposed in alignmentwith the opening 85. The opening 85 and the slot 87 are of such sizethat the cutter member such as the saw blade 22, when it is disposed inoperative position in the piston 61, may extend through the opening 85and the abutment member 87, and the .guard 91 maybe mounted on andremoved from the boss 44 by moving the guard 81 onto and off from thefree endv portion of the saw blade 22.

The drive mechanism M, for reciprocating the slide 51 ,and, thereby, thecutter member 62, includes .a bevel' gear 91, Fig. 2, mounted on thelower .end portion of a shaft 92 which is journaled in a boss 94projecting down wardly from the central portion of the inner face vofthe top wall 24 of .the housing H. A pin 96 is mounted in 'thefbevelgear 91 and projects from the lower face iii) thereof into an elongatedslot 97 formed in, and extending longitudinally of, the cross bar 54 ofthe slide 51.

A roller 99 is journaled on the lower end portion of the pin 96 and isdisposed in the slot 97 in engagement with both longitudinal sides ofthe slot 97. The slot 97 is of such length and is so disposed in thecross bar 54 that upon rotation of the gear 91 with the shaft 92, theroller 99 may reciprocate in the slot 97 and is thereby effective tomove the slide 51 and the piston 61 longitudinally inwardly andoutwardly relative to the openings 47 and 49, and thereby longitudinallyreciprocate the cutter member 62 attached to the piston 61.

The bevel gear 91 has teeth 101 formed on the upper peripheral edgeportion thereof which are engaged with teeth 102 on the bevel gear 103which is mounted on and secured to a shaft 105 journaled in a bushing106 mounted in and extending through the boss 33 on the end Wall 25 ofthe housing H. The shaft 105 projects outwardly from the housing H andterminates in its outer end portion in an enlarged head 108 having atapped opening 109 formed in the free end portion thereof for receptionof, and threaded engagement with, the stud 112 of a suitable adapter or,coupling member 114. The

coupling member 114 has a shaft 116 projecting from the end opposite thestud 112, the shaft 116 being operatively engageable in a chuck 118 ofthe drill D for connecting the shaft 105 to the drill D. for rotationthereby. The coupling member 114 is readily removable from the shaft105, and it will be appreciated by those skilled in the art, that othercoupling members may be used in place thereof without departing from thepurview of my invention.

' handle 121 and is threadedly engaged in the side wall 28.

In the operation of my novel attachment 20 a coupling member 114 of theproper size and shape may be screwed into the head 108 of theshaft 105.With the coupling member 114 so connected to the shaft 105, it will beseen that the power unit or drill D may be readily, operativelyconnected to the shaft 105 by engaging the.

chuck 118 with the shaft 1169f the coupling member 114. The .operatormay then grasp the handle 121 on the attachment 20 with one hand, andthe handle .125 of the drill D in the other hand, and by controlling thecontrol switch of the drill D, such as, the trigger 127 thereof, Fig. l,the shaft 105 may be driven by the drill D to thereby rotate the gears,103 and .91, and cause the slide 51 to reciprocate inwardly andoutwardly I lative to the end wall 26 to correspondingly reciprocate thepiston 61 and the cutter member 62.

In applying the cutter member 62 to a workpiece to be operated upon, theattachment 20 may, if desired, be held entirely by hand such relation tothe work-piece that the housing H is held stationary with respect to thework-piece and with the cutting edge of the cutter member 62 disposed inthe desired cutting engagement with work-piece; 'However, there arevarious other ways in which the attachment 20 may be sup-.

ported in operative position relative to the work-piece.

Thus, for example, if desired the workpiece may be blocked or clamped inproper position on a supporting member such as a work table or workbench, not shown, and the attachment 20 may be manually held in cuttingrelation thereto with the abutment member 83 rest? piece, and with thefront face of the guard 81 disposed in abutting relation to thework-piece. It will beseen that, in all instances, the work-pieceand'the housing H are normally preferably held in stationary positionrelative to each other, with the cutting stroke of the cutter member 62afforded by the reciprocating thereof in the housing H.

From the foregoing it will be seen that I have afforded a novelattachment for hand drills and the like, wherein a cutter member may bereciprocated by the hand drill in a novel and expeditious manner.

Also, it will be seen that I have atfordcd a novel attachment wherein acutter member may be quickly and easily operatively connected to a slidemember.

in addition, it will be seen that I have afforded a novel attachment ofthe aforementioned type wherein the slide thereof is mounted on,supported by, and removable with a removable side wall of the attachmentin a novel and expeditious manner.

Thus, while I have illustrated and described the preferred embodiment ofmy invention, it is to be understood that this is capable of variationand modification, and I therefore do not wish to be limited to theprecise details set forth, but desire to avail myself of such changesand alterations as fall within the purview of the following claims.

I claim:

1. In an attachment for hand drills and the like for driving areciprocatory hand tool member, an elongated housing including aremovable bottom wall having a portion projecting outwardly from saidhousing, rotatable drive means mounted in said housing and including acoupling member for operatively connecting said means to such a drillfor rotation by the latter, a slide operatively connected to said drivemeans and movably mounted in said housing in alignment with said portionof said bottom wall for reciprocation by said drive means inwardly andoutwardly relative to said housing during such rotation of said drivemeans, means including said outwardly projecting portion of said bottomwall for supporting such a hand tool member, and means slidably mountedin said portion for operatively connecting said hand tool member to saidslide for reciprocation by the latter relative to said housing and tosaid portion of said bottom wall upon said reciprocation of said slideby said drive means.

2. An attachment for hand drills and the like for driving areciprocatory cutting member, said attachment comprising a housingincluding an end wall, an intermediate partition wall, and a removablebottom wall, said bottom wall having a laterally projecting portiondisposed adjacent to and in parallel relation to said end wall, a slidereciprocably mounted in said partition wall and extending outwardlythrough said end wall and said portion of said bottom wall forreciprocation through said end wall and said portion of said bottom wallinto and out of said housing, rotatable means mounted in said housingand operatively connected to said slide for reciprocating the latterupon rotation of said means, said rotatable means including a couplingmember projecting from said housing for operatively connecting saidmeans to such a hand drill for rotation by the latter, and means forconnecting said slide to such a cutting memher.

3. An attachment for hand drills and the like for driving areciprocatory cutting member, said attachment comprising a housingcomprising a substantially cupshaped body member having an open bottom,and a bottom wall removably mounted on said body member in closingrelation to said open bottom, said body member including an end wall andan intermediate partition wall, said end wall having an arcuate-shapedopening therein, said bottom wall having a laterally projecting endportion having an opening extending therethrough, said end portion beingdisposed adjacent to said end wall with said last mentioned openingdisposed in alignment with said arcuate-shaped opening, a slidereciprocably mounted in said partition wall in engagement with saidbottom wall and extending toward said openings for reciprocationinwardly and outwardly relative thereto, rotatable means mounted in saidhousing and operatively connected to said slide for reciprocating thelatter upon rotation of said means, said rotatable means including acoupling member rotatably mounted on said housing for operativelyconnecting said means to such a hand drill for rotation by the latter,and a connecting member reciprocably mounted in said opening in saidbottom wall and operatively connected to said slide for reciprocationwith the latter for connecting said slide to such a cutting member, saidslide and said connecting member being freely removable with said bottomwall from said body member.

4. In an attachment for hand-drills and the like for driving areciprocatory elongated cutter member, an elongated housing having a topwall, two oppositely disposed side walls, two oppositely disposed endwalls, and a removable bottom wall, said bottom wall having an endportion projecting outwardly from said housing, one of said end wallshaving an opening therein, an elongated slide slidably mounted on saidbottom wall and projecting outwardly through said opening in said oneend wall for longitudinal reciprocation into and out of said housingthrough said opening, one portion of said slide being disposed in saidhousing at all times during such reciprocation of said slide, drivemeans rotatably mounted in said housing and operatively connected tosaid slide for reciprocating said slide upon rotation of said drivemeans, said drive means including a coupling member projecting from saidhousing for operatively connecting said drive means to such a drill forrotation thereby, said end portion of said bottom wall having an openingextending therethrough substantially in alignment with said opening insaid one end wall, and a bearing member mounted on one end of said slidefor reciprocation therewith and slidably mounted in said opening in saidbottom wall for reciprocation in the latter, said bearing member havinga slot therein for supportingly receiving an end portion of such anelongated cutter member for supporting said cutter member on said endportion of said bottom wall in substantially longitudinal alignment withsaid one portion of said slide for reciprocation with said sliderelative to said end portion of said bottom wall.

References Cited in the file of this patent UNITED STATES PATENTS1,441,132 Tabor Jan. 2, 1923 1,481,055 Fullbright Jan. 15, 19242,143,981 Harding Jan. 17, 1939 2,307,174 Wachs Ian. 5, 1943 2,337,769Redenbo Dec. 28, 1943 2,484,158 Elser Oct. 11, 1949 2,541,716 Oster Feb.13, 1951 2,621,685 Butz Dec. 16, 1952 FOREIGN PATENTS 100,137 SwedenOct. 29, 1940 933,625 France Apr. 27, 1948

